granicus.if.org Git - strace/blob - execve.c

   1 #include "defs.h"
   2
   3 static void
   4 printargv(struct tcb *tcp, long addr)
   5 {
   6         union {
   7                 unsigned int p32;
   8                 unsigned long p64;
   9                 char data[sizeof(long)];
  10         } cp;
  11         const char *sep;
  12         unsigned int n = 0;
  13         unsigned wordsize = current_wordsize;
  14
  15         cp.p64 = 1;
  16         for (sep = ""; !abbrev(tcp) || n < max_strlen / 2; sep = ", ", ++n) {
  17                 if (umoven(tcp, addr, wordsize, cp.data) < 0) {
  18                         tprintf("%#lx", addr);
  19                         return;
  20                 }
  21                 if (wordsize == 4)
  22                         cp.p64 = cp.p32;
  23                 if (cp.p64 == 0)
  24                         break;
  25                 tprints(sep);
  26                 printstr(tcp, cp.p64, -1);
  27                 addr += wordsize;
  28         }
  29         if (cp.p64)
  30                 tprintf("%s...", sep);
  31 }
  32
  33 static void
  34 printargc(const char *fmt, struct tcb *tcp, long addr)
  35 {
  36         int count;
  37         char *cp;
  38
  39         for (count = 0; umove(tcp, addr, &cp) >= 0 && cp != NULL; count++) {
  40                 addr += sizeof(char *);
  41         }
  42         tprintf(fmt, count, count == 1 ? "" : "s");
  43 }
  44
  45 int
  46 sys_execve(struct tcb *tcp)
  47 {
  48         if (entering(tcp)) {
  49                 printpath(tcp, tcp->u_arg[0]);
  50                 if (!verbose(tcp))
  51                         tprintf(", %#lx", tcp->u_arg[1]);
  52                 else {
  53                         tprints(", [");
  54                         printargv(tcp, tcp->u_arg[1]);
  55                         tprints("]");
  56                 }
  57                 if (!verbose(tcp))
  58                         tprintf(", %#lx", tcp->u_arg[2]);
  59                 else if (abbrev(tcp))
  60                         printargc(", [/* %d var%s */]", tcp, tcp->u_arg[2]);
  61                 else {
  62                         tprints(", [");
  63                         printargv(tcp, tcp->u_arg[2]);
  64                         tprints("]");
  65                 }
  66         }
  67         return 0;
  68 }
  69
  70 #if defined(SPARC) || defined(SPARC64)
  71 int
  72 sys_execv(struct tcb *tcp)
  73 {
  74         if (entering(tcp)) {
  75                 printpath(tcp, tcp->u_arg[0]);
  76                 if (!verbose(tcp))
  77                         tprintf(", %#lx", tcp->u_arg[1]);
  78                 else {
  79                         tprints(", [");
  80                         printargv(tcp, tcp->u_arg[1]);
  81                         tprints("]");
  82                 }
  83         }
  84         return 0;
  85 }
  86 #endif /* SPARC || SPARC64 */